Data Description

The repository consists of the downlink control information (DCI) messages collected in a commercial three-sector eNB of the SFR mobile network operator (MNO) in the city center of Rennes, France. We performed one-week measurement campaign between Saturday, February 19, and Friday, February 25, 2022. The MNO uses four different frequency bands in the monitored sector:

  1. EARFCN 6300: 800 MHz band and a bandwidth of 10 MHz
  2. EARFCN 1501: 1800 MHZ band and a bandwidth of 20 MHz
  3. EARFCN 78: 2100 MHZ band and a bandwidth of 15 MHz
  4. EARFCN 2825: 2600 MHZ band and a bandwidth of 15 MHz

 

For each day and each frequency band, the data is stored in a CSV file named TraceDATE_sfr_earfcnXX.csv, where DATE represents the date in yyyymmdd format and XX represents the EARFCN of the frequency band. In the CSV file, each row represents a DCI message, and the columns include the following features:

  • Time: Unix timestamp in milliseconds
  • rnti: RNTI associated with the DCI
  • SFN: system frame number
  •  format: DCI format (0: format0 => uplink allocation, 2: format1A => downlink allocation, , 6: format2 => downlink allocation) (see also this page)
  •  preamble: random access preamble
  •  ta: first timing advance
  •  nb_TB: number of enabled transport blocks
  •  MCSi_1: MCS index of the first transport block (-2: TB is disabled )
  •  MCSi_2: MCS index of the second transport block (-2: TB is disabled )
  •  TBS_1: TBS of first transport block (-2: TB is disabled )
  •  TBS_2: TBS of second transport block (-2: TB is disabled )
  • nb_PRB: number of allocated PRBs
  • connection_id: unique connection identifier

 

Note: the first values of the connection identifier are reserved: 1 for RA-RNTI, 2 for P-RNTI, and 3 for SI-RNTI. The other values are used to identify user connections (C-RNTI).

Note that MCS is usually between 0 and 28. Values 29, 30 and 31 are special values (see TS 36.213 section 8.6.2). MCS=30 is used to indicate that the MCS of the last DCI (for the same RNTI) is reused.